RARELY SEEN Thelodont Fossil Fish from Silurian Scotland

Name: Agnatha; Thelodontiformes; Loganiidae; Loganellia sp.

Geological Time: Middle Silurian (Wenlockian Stage)

Size (25.4mm=1 inch): 48 mm in length (if straightened) on a 30 mm by 19 mm matrix

Fossil Site: Leshmagow, Scotland

Code: UKF43

Price: $325.00

Description: The Thelodontia are a group of fishes most commonly known from their distinctive tooth-like scales. Indeed the term Thelodont , derived from Greek, means nipple tooth. The teeth have a characteristic crown made of dentine. The scales even on a single specimen are quite variable. Thelodonts are rarely found as complete specimens; those that are show them to be flattened fish, many of which were bottom dwellers. Recent finds of intact specimens from Canada show that they radiated into some deep-bodied forms that swam freely in the water column. These deep-bodied forms may have been more closely allied with jawed fishes than their other relatives. All Thelodonts were extinct by the Upper Devonian.

Complete examples are quite rare, making this a most desirable specimen. I’ve included a restoration of the similar Lanarkia.

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